<template>
  <!-- html -->
  <div class="person">
    <h2>姓名:{{ person.name }}</h2>
    <h2>年龄:{{ person.age }}</h2>
    <h2>汽车:{{ person.car.c1 }} - {{ person.car.c2 }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changeC1">修改第一台车</button>
    <button @click="changeC2">修改第二台车</button>
    <button @click="changeCar">修改整台车</button>
  </div>
</template>

<script lang="ts" setup name="Person">
import { reactive, watch } from "vue";

//数据
let person = reactive({
  name: "张三",
  age: 18,
  car: {
    c1: "奔驰",
    c2: "宝马",
  },
});

//方法
function changeName() {
  person.name += "~";
}
function changeAge() {
  person.age += 1;
}
function changeC1() {
  person.car.c1 = "小qq";
}
function changeC2() {
  person.car.c2 = "迈巴赫";
}
function changeCar() {
  person.car = { c1: "雅迪", c2: "艾玛" };
}

//监视 情况五：监视上述的多个数据
watch([() => person.name, () => person.car.c1], (nameValue, oldValue) => {
  console.log("改变了", nameValue, oldValue);
});
</script>

<style scoped>
/* 样式 */
.person {
  background-color: skyblue;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;
}
button {
  margin: 0 5px;
}
</style>
